Verfahren zur Herstellung von formfesten Spritzgussartikeln aus Polyestern aromatischer Dicarbonsäuren

摘要

Dimensionally stable articles are made by injection moulding a polyester of an aromatic dicarboxylic acid and a dihydric alcohol, which polyester contains up to 10% by weight of a finely-divided polymer of one or more olefines. In examples, polypropylene or poly-(4-methyl-pentene) was added to (1) and (2) polyethylene terephthalate chips; (3) a mixture of dimethyl terephthalate and ethylene glycol which was then reacted in the normal manner to produce polyethylene terephthalate.